[thirdparty/git.git] / commit-tree.c

/*
 * GIT - The information manager from hell
 *
 * Copyright (C) Linus Torvalds, 2005
 */
#include "cache.h"

#include <pwd.h>
#include <time.h>
#include <string.h>
#include <ctype.h>
#include <time.h>

#define BLOCKING (1ul << 14)
#define ORIG_OFFSET (40)

/*
 * Leave space at the beginning to insert the tag
 * once we know how big things are.
 *
 * FIXME! Share the code with "write-tree.c"
 */
static void init_buffer(char **bufp, unsigned int *sizep)
{
	char *buf = malloc(BLOCKING);
	memset(buf, 0, ORIG_OFFSET);
	*sizep = ORIG_OFFSET;
	*bufp = buf;
}

static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
{
	char one_line[2048];
	va_list args;
	int len;
	unsigned long alloc, size, newsize;
	char *buf;

	va_start(args, fmt);
	len = vsnprintf(one_line, sizeof(one_line), fmt, args);
	va_end(args);
	size = *sizep;
	newsize = size + len;
	alloc = (size + 32767) & ~32767;
	buf = *bufp;
	if (newsize > alloc) {
		alloc = (newsize + 32767) & ~32767;
		buf = realloc(buf, alloc);
		*bufp = buf;
	}
	*sizep = newsize;
	memcpy(buf + size, one_line, len);
}

static int prepend_integer(char *buffer, unsigned val, int i)
{
	buffer[--i] = '\0';
	do {
		buffer[--i] = '0' + (val % 10);
		val /= 10;
	} while (val);
	return i;
}

static void finish_buffer(char *tag, char **bufp, unsigned int *sizep)
{
	int taglen;
	int offset;
	char *buf = *bufp;
	unsigned int size = *sizep;

	offset = prepend_integer(buf, size - ORIG_OFFSET, ORIG_OFFSET);
	taglen = strlen(tag);
	offset -= taglen;
	buf += offset;
	size -= offset;
	memcpy(buf, tag, taglen);

	*bufp = buf;
	*sizep = size;
}

static void remove_special(char *p)
{
	char c;
	char *dst = p, *src = p;

	for (;;) {
		c = *src;
		src++;
		switch(c) {
		case '\n': case '<': case '>':
			continue;
		}
		*dst++ = c;
		if (!c)
			break;
	}

	/*
	 * Go back, and remove crud from the end: some people
	 * have commas etc in their gecos field
	 */
	dst--;
	while (--dst >= p) {
		unsigned char c = *dst;
		switch (c) {
		case ',': case ';': case '.':
			*dst = 0;
			continue;
		}
		break;
	}
}

static const char *month_names[] = {
        "Jan", "Feb", "Mar", "Apr", "May", "Jun",
        "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};

static const char *weekday_names[] = {
        "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};


static char *skipfws(char *str)
{
	while (isspace(*str))
		str++;
	return str;
}

	
/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
   (i.e. English) day/month names, and it doesn't work correctly with %z. */
static void parse_rfc2822_date(char *date, char *result, int maxlen)
{
	struct tm tm;
	char *p;
	int i, offset;
	time_t then;

	memset(&tm, 0, sizeof(tm));

	/* Skip day-name */
	p = skipfws(date);
	if (!isdigit(*p)) {
		for (i=0; i<7; i++) {
			if (!strncmp(p,weekday_names[i],3) && p[3] == ',') {
				p = skipfws(p+4);
				goto day;
			}
		}
		return;
	}					

	/* day */
 day:
	tm.tm_mday = strtoul(p, &p, 10);

	if (tm.tm_mday < 1 || tm.tm_mday > 31)
		return;

	if (!isspace(*p))
		return;

	p = skipfws(p);

	/* month */

	for (i=0; i<12; i++) {
		if (!strncmp(p, month_names[i], 3) && isspace(p[3])) {
			tm.tm_mon = i;
			p = skipfws(p+strlen(month_names[i]));
			goto year;
		}
	}
	return; /* Error -- bad month */

	/* year */
 year:	
	tm.tm_year = strtoul(p, &p, 10);

	if (!tm.tm_year && !isspace(*p))
		return;

	if (tm.tm_year > 1900)
		tm.tm_year -= 1900;
		
	p=skipfws(p);

	/* hour */
	if (!isdigit(*p))
		return;
	tm.tm_hour = strtoul(p, &p, 10);
	
	if (!tm.tm_hour > 23)
		return;

	if (*p != ':')
		return; /* Error -- bad time */
	p++;

	/* minute */
	if (!isdigit(*p))
		return;
	tm.tm_min = strtoul(p, &p, 10);
	
	if (!tm.tm_min > 59)
		return;

	if (isspace(*p))
		goto zone;

	if (*p != ':')
		return; /* Error -- bad time */
	p++;

	/* second */
	if (!isdigit(*p))
		return;
	tm.tm_sec = strtoul(p, &p, 10);
	
	if (!tm.tm_sec > 59)
		return;

	if (!isspace(*p))
		return;

 zone:
	p = skipfws(p);

	if (*p == '-')
		offset = -60;
	else if (*p == '+')
		offset = 60;
	else
	       return;

	if (!isdigit(p[1]) || !isdigit(p[2]) || !isdigit(p[3]) || !isdigit(p[4]))
		return;

	i = strtoul(p+1, NULL, 10);
	offset *= ((i % 100) + ((i / 100) * 60));

	if (*(skipfws(p + 5)))
		return;

	then = mktime(&tm); /* mktime appears to ignore the GMT offset, stupidly */
	if (then == -1)
		return;

	then -= offset;

	snprintf(result, maxlen, "%lu %5.5s", then, p);
}

static void check_valid(unsigned char *sha1, const char *expect)
{
	void *buf;
	char type[20];
	unsigned long size;

	buf = read_sha1_file(sha1, type, &size);
	if (!buf || strcmp(type, expect))
		die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
	free(buf);
}

/*
 * Having more than two parents may be strange, but hey, there's
 * no conceptual reason why the file format couldn't accept multi-way
 * merges. It might be the "union" of several packages, for example.
 *
 * I don't really expect that to happen, but this is here to make
 * it clear that _conceptually_ it's ok..
 */
#define MAXPARENT (16)

int main(int argc, char **argv)
{
	int i, len;
	int parents = 0;
	unsigned char tree_sha1[20];
	unsigned char parent_sha1[MAXPARENT][20];
	unsigned char commit_sha1[20];
	char *gecos, *realgecos, *commitgecos;
	char *email, *commitemail, realemail[1000];
	char date[20], realdate[20];
	char *audate;
	char comment[1000];
	struct passwd *pw;
	time_t now;
	struct tm *tm;
	char *buffer;
	unsigned int size;

	if (argc < 2 || get_sha1_hex(argv[1], tree_sha1) < 0)
		usage("commit-tree <sha1> [-p <sha1>]* < changelog");

	check_valid(tree_sha1, "tree");
	for (i = 2; i < argc; i += 2) {
		char *a, *b;
		a = argv[i]; b = argv[i+1];
		if (!b || strcmp(a, "-p") || get_sha1_hex(b, parent_sha1[parents]))
			usage("commit-tree <sha1> [-p <sha1>]* < changelog");
		check_valid(parent_sha1[parents], "commit");
		parents++;
	}
	if (!parents)
		fprintf(stderr, "Committing initial tree %s\n", argv[1]);
	pw = getpwuid(getuid());
	if (!pw)
		die("You don't exist. Go away!");
	realgecos = pw->pw_gecos;
	len = strlen(pw->pw_name);
	memcpy(realemail, pw->pw_name, len);
	realemail[len] = '@';
	gethostname(realemail+len+1, sizeof(realemail)-len-1);
	if (!strchr(realemail+len+1, '.')) {
		strcat(realemail, ".");
		getdomainname(realemail+strlen(realemail), sizeof(realemail)-strlen(realemail)-1);
	}
	time(&now);
	tm = localtime(&now);

	strftime(realdate, sizeof(realdate), "%s %z", tm);
	strcpy(date, realdate);

	commitgecos = getenv("COMMIT_AUTHOR_NAME") ? : realgecos;
	commitemail = getenv("COMMIT_AUTHOR_EMAIL") ? : realemail;
	gecos = getenv("AUTHOR_NAME") ? : realgecos;
	email = getenv("AUTHOR_EMAIL") ? : realemail;
	audate = getenv("AUTHOR_DATE");
	if (audate)
		parse_rfc2822_date(audate, date, sizeof(date));

	remove_special(gecos); remove_special(realgecos); remove_special(commitgecos);
	remove_special(email); remove_special(realemail); remove_special(commitemail);

	init_buffer(&buffer, &size);
	add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));

	/*
	 * NOTE! This ordering means that the same exact tree merged with a
	 * different order of parents will be a _different_ changeset even
	 * if everything else stays the same.
	 */
	for (i = 0; i < parents; i++)
		add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));

	/* Person/date information */
	add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
	add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", commitgecos, commitemail, realdate);

	/* And add the comment */
	while (fgets(comment, sizeof(comment), stdin) != NULL)
		add_buffer(&buffer, &size, "%s", comment);

	finish_buffer("commit ", &buffer, &size);

	write_sha1_file(buffer, size, commit_sha1);
	printf("%s\n", sha1_to_hex(commit_sha1));
	return 0;
}
Commit	Line	Data
8bc9a0c7 LT	1	/*
	2	* GIT - The information manager from hell
	3	*
	4	* Copyright (C) Linus Torvalds, 2005
	5	*/
e83c5163 LT	6	#include "cache.h"
	7
	8	#include <pwd.h>
	9	#include <time.h>
27de946d DW	10	#include <string.h>
	11	#include <ctype.h>
	12	#include <time.h>
e83c5163 LT	13
	14	#define BLOCKING (1ul << 14)
	15	#define ORIG_OFFSET (40)
	16
	17	/*
	18	* Leave space at the beginning to insert the tag
	19	* once we know how big things are.
	20	*
	21	* FIXME! Share the code with "write-tree.c"
	22	*/
	23	static void init_buffer(char *bufp, unsigned int sizep)
	24	{
	25	char *buf = malloc(BLOCKING);
	26	memset(buf, 0, ORIG_OFFSET);
	27	*sizep = ORIG_OFFSET;
	28	*bufp = buf;
	29	}
	30
	31	static void add_buffer(char *bufp, unsigned int sizep, const char *fmt, ...)
	32	{
	33	char one_line[2048];
	34	va_list args;
	35	int len;
	36	unsigned long alloc, size, newsize;
	37	char *buf;
	38
	39	va_start(args, fmt);
	40	len = vsnprintf(one_line, sizeof(one_line), fmt, args);
	41	va_end(args);
	42	size = *sizep;
	43	newsize = size + len;
	44	alloc = (size + 32767) & ~32767;
	45	buf = *bufp;
	46	if (newsize > alloc) {
aebb2679	47	alloc = (newsize + 32767) & ~32767;
e83c5163 LT	48	buf = realloc(buf, alloc);
	49	*bufp = buf;
	50	}
	51	*sizep = newsize;
	52	memcpy(buf + size, one_line, len);
	53	}
	54
	55	static int prepend_integer(char *buffer, unsigned val, int i)
	56	{
	57	buffer[--i] = '\0';
	58	do {
	59	buffer[--i] = '0' + (val % 10);
	60	val /= 10;
	61	} while (val);
	62	return i;
	63	}
	64
	65	static void finish_buffer(char tag, char bufp, unsigned int sizep)
	66	{
	67	int taglen;
	68	int offset;
	69	char buf = bufp;
	70	unsigned int size = *sizep;
	71
	72	offset = prepend_integer(buf, size - ORIG_OFFSET, ORIG_OFFSET);
	73	taglen = strlen(tag);
	74	offset -= taglen;
	75	buf += offset;
	76	size -= offset;
	77	memcpy(buf, tag, taglen);
	78
	79	*bufp = buf;
	80	*sizep = size;
	81	}
	82
	83	static void remove_special(char *p)
	84	{
	85	char c;
74b2428f	86	char dst = p, src = p;
e83c5163 LT	87
e83c5163 LT	88	for (;;) {
74b2428f BR	89	c = *src;
74b2428f BR	90	src++;
e83c5163 LT	91	switch(c) {
	92	case '\n': case '<': case '>':
	93	continue;
	94	}
	95	*dst++ = c;
	96	if (!c)
	97	break;
	98	}
5e5128ed LT	99
	100	/*
	101	* Go back, and remove crud from the end: some people
	102	* have commas etc in their gecos field
	103	*/
	104	dst--;
	105	while (--dst >= p) {
	106	unsigned char c = *dst;
	107	switch (c) {
	108	case ',': case ';': case '.':
	109	*dst = 0;
	110	continue;
	111	}
	112	break;
	113	}
e83c5163 LT	114	}
e83c5163 LT	115
27de946d DW	116	static const char *month_names[] = {
	117	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
	118	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	119	};
	120
	121	static const char *weekday_names[] = {
	122	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
	123	};
	124
	125
	126	static char skipfws(char str)
	127	{
	128	while (isspace(*str))
	129	str++;
	130	return str;
	131	}
	132
	133
	134	/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
	135	(i.e. English) day/month names, and it doesn't work correctly with %z. */
	136	static void parse_rfc2822_date(char date, char result, int maxlen)
	137	{
	138	struct tm tm;
	139	char *p;
	140	int i, offset;
	141	time_t then;
	142
	143	memset(&tm, 0, sizeof(tm));
	144
	145	/* Skip day-name */
	146	p = skipfws(date);
	147	if (!isdigit(*p)) {
	148	for (i=0; i<7; i++) {
	149	if (!strncmp(p,weekday_names[i],3) && p[3] == ',') {
	150	p = skipfws(p+4);
	151	goto day;
	152	}
	153	}
	154	return;
	155	}
	156
	157	/* day */
	158	day:
	159	tm.tm_mday = strtoul(p, &p, 10);
	160
	161	if (tm.tm_mday < 1 \|\| tm.tm_mday > 31)
	162	return;
	163
	164	if (!isspace(*p))
	165	return;
	166
	167	p = skipfws(p);
	168
	169	/* month */
	170
	171	for (i=0; i<12; i++) {
	172	if (!strncmp(p, month_names[i], 3) && isspace(p[3])) {
	173	tm.tm_mon = i;
	174	p = skipfws(p+strlen(month_names[i]));
	175	goto year;
	176	}
	177	}
	178	return; /* Error -- bad month */
	179
180	/* year */
181	year:
182	tm.tm_year = strtoul(p, &p, 10);
183
184	if (!tm.tm_year && !isspace(*p))
185	return;
186
187	if (tm.tm_year > 1900)
188	tm.tm_year -= 1900;
189
190	p=skipfws(p);
191
192	/* hour */
193	if (!isdigit(*p))
194	return;
195	tm.tm_hour = strtoul(p, &p, 10);
196
197	if (!tm.tm_hour > 23)
198	return;
199
200	if (*p != ':')
201	return; /* Error -- bad time */
202	p++;
203
204	/* minute */
205	if (!isdigit(*p))
206	return;
207	tm.tm_min = strtoul(p, &p, 10);
208
209	if (!tm.tm_min > 59)
210	return;
211
212	if (isspace(*p))
213	goto zone;
214
215	if (*p != ':')
216	return; /* Error -- bad time */
217	p++;
218
219	/* second */
220	if (!isdigit(*p))
221	return;
222	tm.tm_sec = strtoul(p, &p, 10);
223
224	if (!tm.tm_sec > 59)
225	return;
226
227	if (!isspace(*p))
228	return;
229
230	zone:
231	p = skipfws(p);
232
233	if (*p == '-')
234	offset = -60;
235	else if (*p == '+')
236	offset = 60;
237	else
238	return;
239
240	if (!isdigit(p[1]) \|\| !isdigit(p[2]) \|\| !isdigit(p[3]) \|\| !isdigit(p[4]))
241	return;
242
243	i = strtoul(p+1, NULL, 10);
244	offset = ((i % 100) + ((i / 100) 60));
245
246	if (*(skipfws(p + 5)))
247	return;
248
249	then = mktime(&tm); /* mktime appears to ignore the GMT offset, stupidly */
250	if (then == -1)
251	return;
252
253	then -= offset;
254
255	snprintf(result, maxlen, "%lu %5.5s", then, p);
256	}
257
d0d7cbe7 LT	258	static void check_valid(unsigned char sha1, const char expect)
	259	{
	260	void *buf;
	261	char type[20];
	262	unsigned long size;
	263
	264	buf = read_sha1_file(sha1, type, &size);
	265	if (!buf \|\| strcmp(type, expect))
	266	die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
	267	free(buf);
	268	}
	269
e83c5163 LT	270	/*
	271	* Having more than two parents may be strange, but hey, there's
	272	* no conceptual reason why the file format couldn't accept multi-way
	273	* merges. It might be the "union" of several packages, for example.
	274	*
	275	* I don't really expect that to happen, but this is here to make
	276	* it clear that _conceptually_ it's ok..
	277	*/
	278	#define MAXPARENT (16)
	279
	280	int main(int argc, char **argv)
	281	{
	282	int i, len;
	283	int parents = 0;
	284	unsigned char tree_sha1[20];
	285	unsigned char parent_sha1[MAXPARENT][20];
d6d3f9d0	286	unsigned char commit_sha1[20];
b70070f0 GK	287	char gecos, realgecos, *commitgecos;
b70070f0 GK	288	char email, commitemail, realemail[1000];
27de946d DW	289	char date[20], realdate[20];
27de946d DW	290	char *audate;
e83c5163 LT	291	char comment[1000];
	292	struct passwd *pw;
	293	time_t now;
27de946d	294	struct tm *tm;
e83c5163 LT	295	char *buffer;
	296	unsigned int size;
	297
	298	if (argc < 2 \|\| get_sha1_hex(argv[1], tree_sha1) < 0)
	299	usage("commit-tree <sha1> [-p <sha1>]* < changelog");
	300
d0d7cbe7	301	check_valid(tree_sha1, "tree");
e83c5163 LT	302	for (i = 2; i < argc; i += 2) {
	303	char a, b;
	304	a = argv[i]; b = argv[i+1];
	305	if (!b \|\| strcmp(a, "-p") \|\| get_sha1_hex(b, parent_sha1[parents]))
	306	usage("commit-tree <sha1> [-p <sha1>]* < changelog");
d0d7cbe7	307	check_valid(parent_sha1[parents], "commit");
e83c5163 LT	308	parents++;
	309	}
	310	if (!parents)
	311	fprintf(stderr, "Committing initial tree %s\n", argv[1]);
	312	pw = getpwuid(getuid());
	313	if (!pw)
2de381f9	314	die("You don't exist. Go away!");
e83c5163 LT	315	realgecos = pw->pw_gecos;
	316	len = strlen(pw->pw_name);
	317	memcpy(realemail, pw->pw_name, len);
	318	realemail[len] = '@';
	319	gethostname(realemail+len+1, sizeof(realemail)-len-1);
b96afa59 LT	320	if (!strchr(realemail+len+1, '.')) {
	321	strcat(realemail, ".");
	322	getdomainname(realemail+strlen(realemail), sizeof(realemail)-strlen(realemail)-1);
	323	}
e83c5163	324	time(&now);
27de946d DW	325	tm = localtime(&now);
	326
	327	strftime(realdate, sizeof(realdate), "%s %z", tm);
	328	strcpy(date, realdate);
e83c5163	329
b70070f0 GK	330	commitgecos = getenv("COMMIT_AUTHOR_NAME") ? : realgecos;
b70070f0 GK	331	commitemail = getenv("COMMIT_AUTHOR_EMAIL") ? : realemail;
bf16c71e LT	332	gecos = getenv("AUTHOR_NAME") ? : realgecos;
bf16c71e LT	333	email = getenv("AUTHOR_EMAIL") ? : realemail;
27de946d DW	334	audate = getenv("AUTHOR_DATE");
	335	if (audate)
	336	parse_rfc2822_date(audate, date, sizeof(date));
e83c5163	337
b70070f0 GK	338	remove_special(gecos); remove_special(realgecos); remove_special(commitgecos);
b70070f0 GK	339	remove_special(email); remove_special(realemail); remove_special(commitemail);
e83c5163 LT	340
	341	init_buffer(&buffer, &size);
	342	add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
	343
	344	/*
	345	* NOTE! This ordering means that the same exact tree merged with a
	346	* different order of parents will be a _different_ changeset even
	347	* if everything else stays the same.
	348	*/
	349	for (i = 0; i < parents; i++)
	350	add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
	351
	352	/* Person/date information */
	353	add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
b70070f0	354	add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", commitgecos, commitemail, realdate);
e83c5163 LT	355
	356	/* And add the comment */
	357	while (fgets(comment, sizeof(comment), stdin) != NULL)
	358	add_buffer(&buffer, &size, "%s", comment);
	359
	360	finish_buffer("commit ", &buffer, &size);
	361
d6d3f9d0 LT	362	write_sha1_file(buffer, size, commit_sha1);
d6d3f9d0 LT	363	printf("%s\n", sha1_to_hex(commit_sha1));
e83c5163 LT	364	return 0;
e83c5163 LT	365	}